2002 Honda Passport "po137 po157" Questions

...po155,po135,po137,po157,and one of the 15 amp fuses under the hood now keeps blowing. Make sure they are installed right. Those codes are because of heater circuit and wrong reading from the

po137/po157 codes no activity P0137 / P0157-Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2) refers to the second oxygen sensor on Bank 1. P0137 means the O2 oxygen sensor's voltage remained ...

po137, po157, and po140. I am guessing that this is because of the cat being off. I have heard about cat deletes and was wondering what this consist of and where to get it from. Any help would be much